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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Refractory Metals 2018
Presentation Title Effect of Oxide Coating on the Fusion Welding of Molybdenum Tubing
Author(s) Samuel Barrette-Bédard, Kevin M Jaansalu
On-Site Speaker (Planned) Kevin M Jaansalu
Abstract Scope Two different alloys of molybdenum tubing, 3.2mm in diameter, were closed by gas tungsten arc welding in argon at one atmosphere pressure. There was a noticeable difference between the welds of pure molybdenum and a molybdenum 0.3 wt % lanthia alloy. To determine if lanthia doping could improve the welding of the pure molybdenum, this pure alloy was then welded with a lanthia coating as a flux. Other coatings attempted were yttria, magnesia, and carbon black. The results were mixed. Comparison to calculations from bulk thermodynamics and known surface tension phenomena led to the conclusion that successful welding is likely due to surface tension effects as opposed to any gettering effects.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Metallurgical Study of Pressure Resistance Welded Molybdenum Based Materials
A Study on the Potential Analogous Rhenium Effect of Manganese in Tungsten-molybdenum Alloys Prepared by Mechanical Alloying
Alloying Behaviour and Properties of Tetragonal Nb5Si3
Assessments of the Mo-Si-X-(B) System for High Temperature Structural Application Potentials
Characteristics of Dynamic Abnormal Grain Growth in Mo and Ta
Effect of Oxide Coating on the Fusion Welding of Molybdenum Tubing
Fabrication of Tungsten Nanopowder by Combustion-based Method
Fracture Toughness Evaluation and Microstructural Characterization of Drawn Tungsten Wires
High Ductility in Bulk Polycrystalline Tungsten Produced by Equal Channel Angular Extrusion
High Temperature Oxidation Behaviors of Refractory Complex Concentrated Alloys (RCCAs)
Mechanical Behavior of a Three-phase Mo-Si-B Alloy Produced by Reaction Synthesis
Microstructure and Mechanical Properties of Cr-Si High-temperature Alloys
On the Design and Selection of Nb In Situ Composites
Opportunities for BCC Refractory-metal-based Superalloys
Oxidation and Creep Behavior of Mo-Si-Ti Alloys
Oxidation Resistance of W Substituted Mo-Si-B
Synthesis of MoC-graphite Composite by High-energy Ball Milling
Tensile Response of Binary Mo-Si Solid Solution Alloys

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